Floodplain administrator asks committee to add stormwater and nonregulatory floodplain language to ordinance

Bill Smith, the city's floodplain administrator, presented proposed amendments to the floodplain ordinance intended to address both regulatory and nonregulatory flooding and to add enforceable standards for stormwater management.

Smith explained that the amendments would require development in either regulatory or nonregulatory floodplains to avoid increasing peak flows for multiple storm frequencies (including 1-year, 5-year, 10-year and 100-year events), would expand language on obstructions to include natural channels and creeks, and would add maintenance expectations for culverts and drainage tiles. "If you don't clean this up, your neighbor's gonna flood," Smith said, arguing that the city needs clearer authority to compel maintenance and to prevent trash and beaver dams from restricting flows.

Committee members asked about impacts on current development and on homeowners whose culverts are crushed; Smith and staff said the changes are consistent with practices in other municipalities and that typical solutions include administrative fees or city-installed culverts paid for by the homeowner in some jurisdictions. The committee voted to recommend amending the ordinance with the administrator's suggested language and to forward the package to council.

Next steps: staff will prepare ordinance text incorporating the recommended changes, and present it with implementation guidance and any required developer/vendor specifications to the council.